Retrograde intussusception as a complication of Roux-en-Y anastomosis.

We report a case of a serious complication of a Roux-en-Y reconstruction in which an antiperistaltic jejunojejunal intussusception created a strangulating intestinal obstruction. It is suggested that this complication may be an extreme form of the so-called Roux-en-Y stasis syndrome.